Same update as previous in ResourceManager. Forgot one thing.

Author: Thumperrr

src/ResourceManager.h

@@ -30,7 +30,7 @@ namespace chesspp
         inline ~ResourceManager() {}
 
         //pure virtual, defined depending on what is being loaded.
-        virtual T *onLoadResource(const std::string &key) = 0;
+        virtual T *onLoadResource(const key_type &key) = 0;
 
     public:
         //************************************
@@ -42,7 +42,7 @@ namespace chesspp
         //   Deletes the entry of a key in the resource map. 
         //   This will call deleter_type to deallocate the resource from memory as well.
         //************************************
-        void Free(const std::string &key) {
+        void Free(const key_type &key) {
             map_i i = m_map.find(key);
             m_map.erase(i);
         }

src/TextureManager.h

@@ -56,7 +56,7 @@ namespace chesspp
         // Parameter: const std::string & location
         //   Method that loads an sf::Texture from file name 'location'. 
         //************************************
-        sf::Texture *onLoadResource(const std::string &location)
+        virtual sf::Texture *onLoadResource(const std::string &location)
         {
             sf::Texture *ret = new sf::Texture();
             if(!ret->loadFromFile(location))